A precast beam hoisting and transporting device

Abstract

The application belongs to the technical field of building construction, and particularly relates to a precast beam hoisting and transporting device, which comprises a hoisting beam, a sling, a first half sliding sleeve, a second half sliding sleeve and a reset spring. Before the precast beam is hoisted and transported, the reset spring at both ends of the inner cavity is pushed to make the first half sliding sleeve and the second half sliding sleeve be at the central position of the inner cavity, so that the length of both ends of the sling is always consistent. During the hoisting and transporting of the precast beam, when the precast beam is slightly inclined, the sling drives the first half sliding sleeve and the second half sliding sleeve to slide along the inner cavity to the side, the reset spring at the side is compressed, and the reset spring at the other side is stretched. The elastic force generated by the reset springs at both sides can make the first half sliding sleeve and the second half sliding sleeve reset to the central position of the inner cavity, drive the height of both ends of the sling to return to the horizontal state, thereby adjusting and restoring the precast beam to the horizontal state, and then the stability and safety of the hoisting and transporting of the precast beam are improved.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, specifically a precast beam lifting and transportation device. Background Technology

[0002] Precast beams are beams that are prefabricated in a factory and then transported to the construction site for installation and fixing according to the design requirements. The extensive use of precast components in the construction process not only saves manufacturing space in the small construction site, but also eliminates the need to build molds in real time for casting beams, and eliminates the need to dismantle formwork, making construction simpler.

[0003] After the precast beams are manufactured in the factory, they are transported to the construction site by transport vehicles. First, lifting points are set at both ends of the precast beams, and slings are hoisted to the lifting points at both ends of the precast beams. Then, cranes and electric hoists are used to lift and suspend them. After the position is measured, they are hoisted to the installation position.

[0004] During the hoisting and installation of precast beams, multiple workers are required to use ropes to pull and adjust the angle, direction, and position of the precast beams. The horizontal stability of the precast beams during hoisting and movement directly affects the safety of the construction. If the lengths of the slings at both ends of the precast beam are inconsistent, the precast beam will tilt, which may cause the lower end of the precast beam to be crushed and damaged. At the same time, it will be difficult for workers to adjust and install it.

[0005] Therefore, the present invention provides a precast beam lifting and transportation device. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: A precast beam lifting and transporting device according to this invention includes a lifting beam; multiple pairs of lifting lugs are uniformly fixed to the top surface of the lifting beam, and each pair of lugs is symmetrically arranged; an inner cavity is opened in the middle of the lifting beam; an adjustment structure is slidably arranged inside the inner cavity; guide structures are uniformly installed inside both ends of the lifting beam; a sling is provided at the bottom of the lifting beam; the middle part of the sling slides through the inner cavity; the center of the sling passes through the adjustment structure, and the sling is fixedly connected to the adjustment structure; both ends of the sling slide through the guide structures on both sides respectively; hanging rings are fixedly connected to the bottom of both ends of the sling; before lifting the precast beam, the adjustment structure in the inner cavity will drive the center of the sling to the center position of the lifting beam, so that the length of the drooping parts at both ends of the sling is always in the same state, thereby improving the horizontality and stability of the precast beam lifting; thus facilitating the lifting and installation of the precast beam.

[0008] Preferably, the adjustment structure includes a first semi-sleeve and a second semi-sleeve; the concave surface between the first and second semi-sleeves is uniformly provided with protrusions; the center of the sling passes through the concave surface between the first and second semi-sleeves; the first and second semi-sleeves are fixedly connected by bolts; the outer walls of the first and second semi-sleeves slide against the inner wall of the inner cavity; one end of a return spring is fixedly connected to the outer ring of both ends of the first and second semi-sleeves; the other end of the return spring is fixedly connected to the end of the inner cavity; thereby adjusting and restoring the precast beam to a horizontal state; thus improving the stability and safety of the precast beam hoisting.

[0009] Preferably, multiple pairs of fixed through slots are evenly provided at the bottom of both ends of the lifting beam; the guide structure is fixedly connected to each pair of fixed through slots by long bolts; the guide structure includes a U-shaped fixing frame; a fixing protrusion is fixedly connected to the side of the U-shaped fixing frame near the fixed through slot; the fixing protrusion matches the fixed through slot; a guide concave wheel is rotatably installed in the middle of the U-shaped fixing frame; the outer wall of the sling slides in contact with the concave surface of the guide concave wheel; both ends of the sling slide through the multiple guide concave wheels in a corrugated manner; the weight of the sling is evenly distributed on the multiple guide concave wheels, thereby reducing the large local weight of the lifting beam and reducing the probability of local breakage of the lifting beam; furthermore, when the precast beam tilts, the friction between the sling and the multiple guide concave wheels slows down the tilting speed of the precast beam, making it easier for workers to make timely adjustments or avoid obstacles, thereby improving the safety of lifting the precast beam.

[0010] Preferably, the top and bottom surfaces of the lifting beam are evenly provided with multiple fixed grooves; each fixed groove corresponds to each pair of fixed through grooves; the top surface of the U-shaped fixing frame is fixedly connected to a fixed slide rail; the fixed slide rail matches the fixed groove; thereby facilitating the worker to lock and install the U-shaped fixing frame.

[0011] Preferably, a pair of support frames are fixed to the top and bottom of both sides of the U-shaped fixing frame; a support wheel is rotatably installed at the end of the support frame near the guide concave wheel; positioning grooves are opened on both sides of the outer ring of the guide concave wheel; the outer circumference of the support wheel slides in conjunction with the inner circumference of the positioning groove; the support wheel fixed by the support frame supports and limits the guide concave wheel, reducing the shaking and displacement of the guide concave wheel when subjected to pressure and rotation, thereby improving the stability of the guide concave wheel.

[0012] Preferably, brackets are fixedly connected to the bottom surfaces of both ends of the lifting beam; the brackets correspond to the outermost adjustment structures at both ends of the lifting beam; a sliding frame is slidably installed on the top surface of the bracket; a limiting concave wheel is rotatably installed on the side of the sliding frame near the end of the lifting beam; the outer concave surface of the limiting concave wheel slides in contact with the outer wall of the sling; a first electric actuator is fixedly connected to the side of the bracket away from the end of the lifting beam; the piston rod of the first electric actuator is fixedly connected to the sliding frame; thereby reducing the probability of the downward-hanging part of the sling colliding or entangled with the outermost guide structure; at the same time, it is convenient for workers to fine-tune the lifting position at both ends of the sling, thus facilitating the lifting of precast beams of different lengths.

[0013] Preferably, a connecting groove is provided on the middle side of the lifting beam; the connecting groove communicates with the inner cavity; a connecting rod is fixedly connected to the middle of the outer wall of the second semi-sleeve; the connecting rod slides through the connecting groove; a slide frame is fixedly connected to the bottom surface of the connecting groove near the outer wall of the lifting beam; a screw is rotatably installed in the middle of the slide frame; a slide seat is slidably installed inside the slide frame; the screw passes through the slide seat, and the screw and the slide seat are threadedly engaged; a concave block is provided on the top of the slide seat; the concave surface of the top of the concave block slides in engagement with the outer wall of the connecting rod; a motor is fixedly connected to the bottom of the side of the lifting beam near the connecting groove; the motor shaft is connected to the end of the screw via a synchronous belt drive; an installation groove is provided on the top surface of the slide seat; the concave block slides in engagement with the installation groove; multiple second electric push rods are evenly fixed to the bottom surface of the concave block and the bottom surface of the installation groove; thereby adjusting and restoring the precast beam to a horizontal state; and then actively adjusting the state of the precast beam.

[0014] Preferably, a laser calibrator is fixedly connected to the middle of the lifting beam on the side away from the connecting groove; the laser emitting end of the laser calibrator penetrates the outer wall of the inner cavity; a positioning reflector is fixedly connected to the middle of the outer wall of the first semi-sliding sleeve; the laser emitting end of the laser calibrator is perpendicularly oriented towards the positioning reflector; thereby determining the degree of inclination of the precast beam, and controlling the start and stop of the motor, thus facilitating the active adjustment of the state of the precast beam.

[0015] Preferably, a balancing structure is installed at the center of the top surface of the lifting beam; the balancing structure includes a sliding beam; the sliding beam is fixedly connected to the center of the top surface of the lifting beam; a counterweight is slidably installed on the top of the sliding beam; a lead screw is rotatably installed in the center of the sliding beam; one end of the lead screw rotatably passes through the end of the sliding beam; the lead screw passes through the counterweight, and the lead screw and the counterweight are threadedly engaged; the level of the lifting beam is controlled and adjusted.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. The precast beam lifting and transporting device of the present invention comprises a lifting beam, slings, a first half-sleeve, a second half-sleeve, and a return spring. Before the precast beam is lifted, the return springs at both ends of the inner cavity push the first and second half-sleeves to the center position of the inner cavity, ensuring that the lengths of the slings at both ends remain consistent. Furthermore, during the lifting process, when the precast beam tilts slightly, the slings cause the first and second half-sleeves to slide along the inner cavity to that side, compressing the return spring on that side and stretching the return spring on the other side. The elastic force generated by the return springs on both sides causes the first and second half-sleeves to return to the center position of the inner cavity, restoring the height of the slings at both ends to a horizontal state, thereby adjusting the precast beam to a horizontal state and improving the stability and safety of the precast beam lifting.

[0018] 2. The precast beam lifting and transporting device of the present invention, by setting up a U-shaped fixing frame and guide concave wheels; the slings are corrugated and sequentially pass around the outer concave surface of the guide concave wheels. When the hanging rings at both ends of the slings are used to load and lift the two ends of the precast beam, the gravity on the slings is evenly distributed on multiple guide concave wheels, thereby reducing the large local gravity generated on the lifted beam and thus reducing the probability of local breakage of the lifted beam; furthermore, when the precast beam tilts, the friction between the slings and multiple guide concave wheels slows down the tilting speed of the precast beam, making it easier for workers to make timely adjustments or avoid obstacles, thereby improving the safety of lifting and transporting the precast beam. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a front perspective view of Embodiment 1 of the present invention;

[0021] Figure 2 This is a perspective view of the back of Embodiment 1 of the present invention;

[0022] Figure 3 This is an exploded view of Embodiment 1 of the present invention;

[0023] Figure 4 This is a partial front view of Embodiment 1 of the present invention;

[0024] Figure 5 yes Figure 1 Enlarged view of a portion of point A in the middle;

[0025] Figure 6 yes Figure 2 Enlarged view of a section at point B in the middle;

[0026] Figure 7 This is a perspective view of the adjusted structure in Embodiment 1 of the present invention;

[0027] Figure 8 This is a structural diagram of the adjusted structure in Embodiment 1 of the present invention;

[0028] Figure 9 This is a perspective view of the guide structure in Embodiment 1 of the present invention;

[0029] Figure 10 This is a perspective view of the bracket in Embodiment 1 of the present invention;

[0030] Figure 11 This is a perspective view of Embodiment 2 of the present invention;

[0031] In the diagram: 1. Lifting beam; 2. Lifting lug; 3. Inner cavity; 4. Lifting sling; 5. No. 1 half-sleeve; 6. No. 2 half-sleeve; 7. Return spring; 8. Fixed through groove; 9. U-shaped fixing frame; 10. Fixed protrusion; 11. Guide concave wheel; 12. Fixed slide groove; 13. Fixed slide rail; 14. Support frame; 15. Support wheel; 16. Positioning groove; 17. Bracket; 18. Sliding frame; 19. Limiting concave wheel; 20. No. 1 electric actuator; 21. Connecting groove; 22. Connecting rod; 23. Slide; 24. Screw; 25. Slide seat; 26. Concave locking block; 27. Motor; 28. Mounting groove; 29. ​​No. 2 electric actuator; 30. Laser calibrator; 31. Positioning reflector; 32. Sliding beam; 33. Counterweight; 34. Lead screw. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0033] Example 1

[0034] like Figures 1 to 4As shown in the embodiment of the present invention, a precast beam lifting and transporting device includes a lifting beam 1; multiple pairs of lifting lugs 2 are uniformly fixed to the top surface of the lifting beam 1, and each pair of lifting lugs 2 is symmetrically arranged; an inner cavity 3 is opened in the middle of the lifting beam 1; an adjustment structure is slidably arranged inside the inner cavity 3; guide structures are uniformly installed inside both ends of the lifting beam 1; a sling 4 is provided at the bottom of the lifting beam 1; the middle of the sling 4 slides through the inner cavity 3; the center of the sling 4 passes through the adjustment structure, and the sling 4 is fixedly connected to the adjustment structure; the sling 4... The two ends of the sling 4 slide through the guide structures on both sides respectively; the bottom of both ends of the sling 4 are fixed with hanging rings; during operation, the number of guide structures on both sides is selected according to the length of the precast beam, so that the hanging rings at both ends of the sling 4 can lift the precast beam in a vertical state; before lifting the precast beam, the adjustment structure in the inner cavity 3 will drive the center of the sling 4 to be at the center position of the lifting beam 1, so that the length of the hanging parts at both ends of the sling 4 is always the same, thereby improving the horizontality and stability of the precast beam lifting; thus facilitating the lifting and installation of the precast beam.

[0035] like Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, the adjustment structure includes a first semi-sleeve 5 and a second semi-sleeve 6; the concave surface between the first semi-sleeve 5 and the second semi-sleeve 6 is uniformly provided with protrusions; the center of the sling 4 passes through the concave surface between the first semi-sleeve 5 and the second semi-sleeve 6; the first semi-sleeve 5 and the second semi-sleeve 6 are fixedly connected by bolts; the outer walls of the first semi-sleeve 5 and the second semi-sleeve 6 slide against the inner wall of the inner cavity 3; one end of a return spring 7 is fixedly connected to the outer ring of both ends of the first semi-sleeve 5 and the second semi-sleeve 6; the other end of the return spring 7 is fixedly connected to the end of the inner cavity 3; during operation, the first semi-sleeve 5 and the second semi-sleeve 6 are fixedly installed by bolts, and the center position of the sling 4 is clamped and fixed, and the fixed strength of the sling 4 is ensured by the provided protrusions; the precast beam is hoisted. Previously, the return springs 7 at both ends of the inner cavity 3 pushed, causing the first half-sleeve 5 and the second half-sleeve 6 to be in the center position of the inner cavity 3, ensuring that the length of the two ends of the sling 4 remained consistent. Furthermore, during the hoisting of the precast beam, when the precast beam tilted slightly, the downward tilting end of the precast beam would pull the sling 4 at that end downward, causing the first half-sleeve 5 and the second half-sleeve 6 to slide along the inner cavity 3 to that side. The return spring 7 on that side would be compressed, causing the return spring 7 on the other side to be stretched. The elastic force generated by the return springs 7 on both sides would cause the first half-sleeve 5 and the second half-sleeve 6 to return to the center position of the inner cavity 3, causing the height of the two ends of the sling 4 to return to a horizontal state, thereby adjusting the precast beam back to a horizontal state. This improved the stability and safety of the precast beam hoisting.

[0036] like Figures 1 to 9 As shown, multiple pairs of fixed through slots 8 are evenly opened at the bottom of both ends of the lifting beam 1; the guide structure is fixed to each pair of fixed through slots 8 by long bolts; the guide structure includes a U-shaped fixing frame 9; a fixing protrusion 10 is fixedly connected to the side of the U-shaped fixing frame 9 near the fixing through slot 8; the fixing protrusion 10 matches the fixing through slot 8; a guide concave wheel 11 is rotatably installed in the middle of the U-shaped fixing frame 9; the outer wall of the sling 4 slides in contact with the concave surface of the guide concave wheel 11; the two ends of the sling 4 slide through multiple guide concave wheels 11 in a corrugated manner; during operation, the number of guide structures on both sides is selected according to the length of the precast beam, and the fixing protrusion 10 on the U-shaped fixing frame 9 is fixed to the guide structure. The U-shaped fixing frame 9 is slidably inserted into the corresponding fixed through slot 8 and secured with bolts. The sling 4 is then wrapped around the outer concave surface of the guide wheel 11 in a corrugated pattern. When the hanging rings at both ends of the sling 4 are used to load and lift the precast beam, the weight of the sling 4 is evenly distributed across the multiple guide wheels 11, thereby reducing the localized heavy load on the lifting beam 1 and reducing the probability of localized breakage of the lifting beam 1. Furthermore, when the precast beam tilts, the friction between the sling 4 and the multiple guide wheels 11 slows down the tilting speed of the precast beam, making it easier for workers to make timely adjustments or avoid obstacles, thus improving the safety of lifting the precast beam.

[0037] like Figure 4 , Figure 5 and Figure 9 As shown, the top and bottom surfaces of the lifting beam 1 are evenly provided with multiple fixed sliding grooves 12; each fixed sliding groove 12 corresponds to each pair of fixed through grooves 8; the top surface of the U-shaped fixing frame 9 is fixedly connected with a fixed sliding rail 13; the fixed sliding rail 13 matches the fixed sliding groove 12; during operation, when installing the U-shaped fixing frame 9, the fixed sliding rail 13 at the top of the U-shaped fixing frame 9 is aligned with the fixed sliding groove 12 and slid in, so that the fixed sliding rail 13 is inserted into the fixed sliding groove 12, and the U-shaped fixing frame 9 is initially fixed, thereby facilitating the worker to lock and install the U-shaped fixing frame 9.

[0038] like Figure 4 , Figure 5 and Figure 9 As shown, a pair of support frames 14 are fixed to the top and bottom of both sides of the U-shaped fixing frame 9; a support wheel 15 is rotatably installed on one end of the support frame 14 near the guide concave wheel 11; positioning grooves 16 are opened on both sides of the outer ring of the guide concave wheel 11; the outer circumference of the support wheel 15 slides in cooperation with the inner circumference of the positioning groove 16; the support wheel 15 fixed by the support frame 14 supports and limits the guide concave wheel 11, reducing the shaking and displacement of the guide concave wheel 11 when subjected to pressure and rotation, thereby improving the stability of the guide concave wheel 11.

[0039] like Figure 4 , Figure 5 and Figure 10 As shown, brackets 17 are fixedly connected to the bottom surfaces of both ends of the lifting beam 1; the brackets 17 correspond to the outermost adjustment structures at both ends of the lifting beam 1; a sliding frame 18 is slidably installed on the top surface of the brackets 17; a limiting concave wheel 19 is rotatably installed on the side of the sliding frame 18 near the end of the lifting beam 1; the outer concave surface of the limiting concave wheel 19 slides in cooperation with the outer wall of the sling 4; a first electric push rod 20 is fixedly connected to the side of the bracket 17 away from the end of the lifting beam 1; the piston rod of the first electric push rod 20 is fixedly connected to the sliding frame 18; during operation, the first electric push rod 20 pushes the sliding frame 18 to slide along the bracket 17, causing the outer concave surface of the limiting concave wheel 19 to lock onto the outer periphery of the sling 4, and pushes the sling 4 to move outward, thereby reducing the probability of the downward-hanging part of the sling 4 colliding or entangled with the outermost guide structure; at the same time, it is convenient for the staff to make fine adjustments to the lifting position at both ends of the sling 4, thereby facilitating the lifting of precast beams of different lengths.

[0040] like Figures 6 to 8 As shown, a connecting groove 21 is provided on the middle side of the lifting beam 1; the connecting groove 21 communicates with the inner cavity 3; a connecting rod 22 is fixedly connected to the middle of the outer wall of the second semi-sleeve 6; the connecting rod 22 slides through the connecting groove 21; a slide frame 23 is fixedly connected to the bottom surface of the connecting groove 21 near the outer wall of the lifting beam 1; a screw 24 is rotatably installed in the middle of the slide frame 23; a slide seat 25 is slidably installed inside the slide frame 23; the screw 24 passes through the slide seat 25, and the screw 24 and the slide seat 25 are threadedly engaged; a concave block 26 is provided on the top of the slide seat 25; the concave surface of the top surface of the concave block 26 slides in engagement with the outer wall of the connecting rod 22; a motor 27 is fixedly connected to the bottom of the side of the lifting beam 1 near the connecting groove 21; the shaft of the motor 27 is connected to the end of the screw 24 via a synchronous belt drive; an installation groove 28 is provided on the top surface of the slide seat 25; The concave locking block 26 slides into the mounting groove 28; multiple second electric actuators 29 are uniformly fixed to the bottom surface of the concave locking block 26 and the bottom surface of the mounting groove 28; during operation, when the precast beam tilts and the return spring 7 cannot be adjusted, the motor 27 drives the screw 24 to rotate via a synchronous belt drive, driving the slide block 25 to slide along the slide frame 23, moving the concave locking block 26 to the bottom of the connecting rod 22, and the second electric actuators 29 push the concave locking block 26 to rise, so that the concave locking block 26 locks the connecting rod 22; then, the drive slide block 25 and the concave locking block 26 move, driving the connecting rod 22 to move along the connecting groove 21, driving the first half-sleeve 5 and the second half-sleeve 6 to return to the center position of the inner cavity 3, driving the height of both ends of the sling 4 to return to the horizontal state, thereby adjusting the precast beam to a horizontal state; then the state of the precast beam is actively adjusted.

[0041] like Figure 1 , Figure 3 and Figure 8 As shown, a laser calibrator 30 is fixedly connected to the side of the lifting beam 1 away from the connecting groove 21; the laser emitting end of the laser calibrator 30 penetrates the outer wall of the inner cavity 3; a positioning reflector 31 is fixedly connected to the middle of the outer wall of the first semi-sleeve 5; the laser emitting end of the laser calibrator 30 is perpendicularly oriented towards the positioning reflector 31; the first semi-sleeve 5 is positioned by the laser calibrator 30 and the positioning reflector 31, the positions of the first semi-sleeve 5 and the second semi-sleeve 6 in the inner cavity 3 are determined, thereby determining the degree of inclination of the precast beam, and at the same time, controlling the start and stop of the motor 27, thereby facilitating the active adjustment of the state of the precast beam.

[0042] Example 2

[0043] like Figure 11 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: a balancing structure is installed in the middle of the top surface of the lifting beam 1; the balancing structure includes a sliding beam 32; the sliding beam 32 is fixedly connected to the middle of the top surface of the lifting beam 1; a counterweight 33 is slidably installed on the top of the sliding beam 32; a lead screw 34 is rotatably installed in the middle of the sliding beam 32; one end of the lead screw 34 rotatably passes through the end of the sliding beam 32; the lead screw 34 passes through the counterweight 33, and the lead screw 34 and the counterweight 33 are threadedly engaged; during operation, when the crane loads the lifting beam 1, by rotating the lead screw 34, the counterweight 33 is driven to move horizontally along the sliding beam 32, thereby controlling and adjusting the level of the lifting beam 1.

[0044] Working principle: Based on the length of the precast beam, select the number of guide structures on both sides, slide the fixing protrusion 10 on the U-shaped fixing frame 9 into the corresponding fixing through groove 8, and use bolts to fix and lock the U-shaped fixing frame 9. The sling 4 is wrapped around the outer concave surface of the guide wheel 11 in a corrugated pattern. The first electric push rod 20 pushes the sliding frame 18 to slide along the bracket 17, causing the outer concave surface of the limiting wheel 19 to be stuck on the outer periphery of the sling 4, and pushing the sling 4 to move outward, reducing the probability of the downward hanging part of the sling 4 colliding or getting tangled with the outermost guide structure.

[0045] Before the precast beam is hoisted, the return springs 7 at both ends of the inner cavity 3 push to make the first half-slip sleeve 5 and the second half-slip sleeve 6 in the center of the inner cavity 3, so that the length of the two ends of the sling 4 is always consistent. When the crane is hoisting the crossbeam 1, the counterweight block 33 is driven to move horizontally along the slide beam 32 by rotating the screw 34, thereby controlling and adjusting the level of the hoisting crossbeam 1.

[0046] The first half-sleeve 5 is positioned using the laser calibrator 30 and the positioning reflector 31 to determine the position of the first half-sleeve 5 and the second half-sleeve 6 in the inner cavity 3, and to determine the degree of inclination of the precast beam.

[0047] When the precast beam is hoisted, if the precast beam tilts slightly, the downward tilting end of the precast beam will pull the sling 4 at that end to move downward, causing the first half-sleeve 5 and the second half-sleeve 6 to slide along the inner cavity 3 to that side. The return spring 7 on that side is compressed, and the return spring 7 on the other side is stretched. The elastic force generated by the return springs 7 on both sides will cause the first half-sleeve 5 and the second half-sleeve 6 to return to the center position of the inner cavity 3, causing the height of both ends of the sling 4 to return to a horizontal state, adjusting the precast beam back to a horizontal state. In addition, the friction between the sling 4 and the multiple guide rollers 11 will slow down the tilting speed of the precast beam.

[0048] When the precast beam tilts and the return spring 7 cannot be adjusted, the motor 27 drives the screw 24 to rotate via the synchronous belt drive, driving the slide block 25 to slide along the slide frame 23, causing the concave block 26 to move to the bottom of the connecting rod 22. The second electric push rod 29 pushes the concave block 26 to rise, causing the concave block 26 to lock the connecting rod 22. Then, the drive slide block 25 and the concave block 26 move, causing the connecting rod 22 to move along the connecting groove 21, causing the first half-sleeve 5 and the second half-sleeve 6 to return to the center position of the inner cavity 3, causing the height of both ends of the sling 4 to return to the horizontal state, and adjusting the precast beam back to the horizontal state. This improves the horizontality and stability of the precast beam hoisting, and facilitates the hoisting and installation of the precast beam.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A precast beam lifting and transporting device, characterized in that: The system includes a lifting beam (1); multiple pairs of lifting lugs (2) are uniformly fixed to the top surface of the lifting beam (1), and each pair of lifting lugs (2) is symmetrically arranged; an inner cavity (3) is opened in the middle of the lifting beam (1); an adjustment structure is slidably arranged inside the inner cavity (3); guide structures are uniformly installed inside both ends of the lifting beam (1); a sling (4) is provided at the bottom of the lifting beam (1); the middle of the sling (4) slides through the inner cavity (3); the center of the sling (4) passes through the adjustment structure, and the sling (4) is fixedly connected to the adjustment structure; both ends of the sling (4) slide through the guide structures on both sides respectively; and hanging rings are fixedly connected to the bottom of both ends of the sling (4). The adjustment structure includes a first half-sleeve (5) and a second half-sleeve (6); the concave surface between the first half-sleeve (5) and the second half-sleeve (6) is uniformly provided with protrusions; the center of the sling (4) passes through the concave surface between the first half-sleeve (5) and the second half-sleeve (6); the first half-sleeve (5) and the second half-sleeve (6) are fixed together by bolts; the outer wall of the first half-sleeve (5) and the second half-sleeve (6) slides in fit with the inner wall of the inner cavity (3); one end of a return spring (7) is fixedly connected to the outer ring of both ends of the first half-sleeve (5) and the second half-sleeve (6); the other end of the return spring (7) is fixedly connected to the end of the inner cavity (3); The bottom of both ends of the lifting beam (1) is evenly provided with multiple pairs of fixed through slots (8); the guide structure is fixed to each pair of fixed through slots (8) by long bolts; the guide structure includes a U-shaped fixing frame (9); a fixing protrusion (10) is fixed to the side of the U-shaped fixing frame (9) near the fixed through slot (8); the fixing protrusion (10) matches the fixed through slot (8); a guide concave wheel (11) is rotatably installed in the middle of the U-shaped fixing frame (9); the outer wall of the sling (4) slides in cooperation with the concave surface in the middle of the guide concave wheel (11); the two ends of the sling (4) slide through multiple guide concave wheels (11) in a corrugated manner. The bottom surfaces of both ends of the lifting beam (1) are fixedly connected to brackets (17); the brackets (17) correspond to the outermost adjustment structures at both ends of the lifting beam (1); a sliding frame (18) is slidably installed on the top surface of the brackets (17); a limiting concave wheel (19) is rotatably installed on the side of the sliding frame (18) near the end of the lifting beam (1); the outer concave surface of the limiting concave wheel (19) slides in cooperation with the outer wall of the sling (4); a first electric push rod (20) is fixedly connected to the side of the brackets (17) away from the end of the lifting beam (1); the piston rod of the first electric push rod (20) is fixedly connected to the sliding frame (18); A connecting groove (21) is provided on the middle side of the lifting beam (1); the connecting groove (21) communicates with the inner cavity (3); a connecting rod (22) is fixedly connected to the middle of the outer wall of the second semi-sleeve (6); the connecting rod (22) slides through the connecting groove (21); a slide (23) is fixedly connected to the bottom surface of the connecting groove (21) near the outer wall of the lifting beam (1); a screw (24) is rotatably installed in the middle of the slide (23); the slide (23) is internally slidably mounted The slide (25) is provided; the screw (24) passes through the slide (25) and is threadedly engaged with the slide (25); a concave block (26) is provided on the top of the slide (25); the concave surface of the top surface of the concave block (26) is slidably engaged with the outer wall of the connecting rod (22); a motor (27) is fixedly connected to the bottom of the side of the lifting beam (1) near the connecting groove (21); the shaft of the motor (27) is connected to the end of the screw (24) by a synchronous belt drive.

2. The precast beam lifting and transporting device according to claim 1, characterized in that: The top and bottom surfaces of the lifting beam (1) are evenly provided with multiple fixed grooves (12); each fixed groove (12) corresponds to each pair of fixed through grooves (8); the top surface of the U-shaped fixing frame (9) is fixedly connected with a fixed slide rail (13); the fixed slide rail (13) matches the fixed groove (12).

3. The precast beam lifting and transporting device according to claim 2, characterized in that: A pair of support frames (14) are fixed to the top and bottom of both sides of the U-shaped fixing frame (9); a support wheel (15) is rotatably installed on one end of the support frame (14) near the guide concave wheel (11); positioning grooves (16) are opened on both sides of the outer ring of the guide concave wheel (11); the outer circumference of the support wheel (15) slides with the inner circumference of the positioning groove (16).

4. The precast beam lifting and transporting device according to claim 1, characterized in that: The top surface of the slide block (25) is provided with an installation groove (28); the concave block (26) is slidably engaged with the installation groove (28); and multiple second electric push rods (29) are uniformly fixed to the bottom surface of the concave block (26) and the bottom surface of the installation groove (28).

5. A precast beam lifting and transporting device according to claim 4, characterized in that: A laser calibrator (30) is fixedly connected to the side of the lifting beam (1) away from the connecting groove (21); the laser emitting end of the laser calibrator (30) penetrates the outer wall of the inner cavity (3); a positioning reflector (31) is fixedly connected to the middle of the outer wall of the first half-sleeve (5); the laser emitting end of the laser calibrator (30) is perpendicular to the positioning reflector (31).

6. The precast beam lifting and transporting device according to claim 1, characterized in that: A balancing structure is installed in the middle of the top surface of the lifting beam (1); the balancing structure includes a sliding beam (32); the sliding beam (32) is fixedly connected to the middle of the top surface of the lifting beam (1); a counterweight (33) is slidably installed on the top of the sliding beam (32); a lead screw (34) is rotatably installed in the middle of the sliding beam (32); one end of the lead screw (34) rotatably passes through the end of the sliding beam (32); the lead screw (34) passes through the counterweight (33), and the lead screw (34) and the counterweight (33) are threadedly engaged.

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